Acromove products incorporate innovative thinking about the latest proprietary and COTS technologies to deliver
superior performance and user experience.
Disk Storage System
All our systems come with a choice of hardware RAID cards, depending on the features you need. The main issues of which card to use involve rebuild speed, SAS expansion, connection to external LTO, and encryption. All the cards we offer include RAID 0/1/3/5/6/10/50/60/JBOD, and support HDDs and SSDs.
ThunderPack Mini™ has an 8 bay 2.5” 15mm 12G SAS3/SATA3 disk array. The capacities we offer range from 8TB to 40TB. It uses the new Highpoint RR3740 12G SAS hardware Raid controller which is installed in a Thunderbolt 2 to PCIe v.3 bridge and delivers speeds that exceed 1000MB/s or more, up to 1300MB/sec depending on the drives being used. Acromove designs our own 12G disk backplanes for reliability and performance.
ThunderPack™ and ServerPack™ have a 24 bay 15mm 12G SAS3/SATA3 disk array. Capacities in these units range from 24TB to 120TB. Their data transfer rate with hardware RAID-6 controller exceeds 1,300MB/s, and as high as 2300MB/s with SSDs.
We only use 2.5” disks (both laptop HDD and SSD) for several important reasons. While both HGST and Seagate now offer 10TB HDDs (12TB disks are on the horizon, too), using fewer large disks to achieve high capacity carries with it several drawbacks. Using many smaller disk drives has several advantages. By standardizing on the 2.5” form factor, precious space is not wasted to accommodate the larger drives.
- Large capacity HDDs are subject to damage from external shock. Here is a comparison chart for a couple of models:
|Seagate ST5000LM000||2.5”||5TB||Shock, Operating 2ms||300 Gs|
|Shock, Non-Operating 1ms||650 Gs|
|Seagate ST2000LM015||2.5”||2TB||Shock, Operating 2ms||400 Gs|
|Shock, Non-Operating 1ms||1000 Gs|
|HGST HUH721010ALE600||3.5”||10TB||Shock, Operating 2ms||70 Gs|
|Shock, Non-Operating 2ms||300 Gs|
|HGST Ultrastar 7K6000||3.5”||2TB||Shock, Operating 2ms||70 Gs|
|Shock, Non-Operating 1ms||300 Gs|
- Large capacity HDDs use more power. Our use of 2.5” HDDs means our units can operate on batteries.
|Seagate ST5000LM000||2.5”||5TB||Read/write Power||1.9/2.1 W|
|Idle Power||1.1 W|
|Seagate ST2000LM015||2.5”||2TB||Read/write Power||1.7/1.8 W|
|HGST HUH721010ALE600||3.5”||10TB||Read/write Power, Average||6.8 W|
|Idle Power||5.0 W|
|HGST HUS7260xxALN61y||3.5”||2TB||Read/write Power, Average||9.1 W|
|Idle Power||7.1 W|
- Large capacity HDDs are heavier per equal storage space. Our lower total weights mean shipping charges are lower. Notice the 2TB 3.5” HDDs weigh more than the 10TB model.
|Seagate ST5000LM000||2.5”||10TB||Weight (two 5TB drives at 190 grams)||380 grams|
|Seagate ST2000LM015||2.5”||2TB||Weight||90 grams|
|HGST HUH721010ALE600||3.5”||10TB||Weight||660 grams|
|HGST HUS7260xxALN61y||3.5”||2TB||Weight||715 grams|
- When using large capacity HDDs in RAID 5 or 6 configurations, a lot of that capacity is sacrificed for the parity drives. In a RAID 5 array, one disk is used for parity, in RAID 6 two disks are used. Smaller capacity HDDs give up less storage space and rebuild times are significantly faster.
|Acromove ServerPack||2.5”||24 drives x 5TB = 120TB||5||115TB|
|AWS Snowball Edge||3.5”||10 drives x 10TB = 100TB||5||90TB|
|Acromove ThunderPack||2.5”||24 drives x 4TB = 96TB||5||92TB|
|Acromove ServerPack||2.5”||24 drives x 5TB = 120TB||6||110TB|
|AWS Snowball Edge||3.5”||10 drives x 10TB = 100TB||6||80TB|
|Acromove ThunderPack||2.5”||24 drives x 4TB = 96TB||6||88TB|
- Large HDDs cost more money, especially when the new higher capacity models are first introduced. Seagate 2.5” laptop drives are a proven commodity, and recently they introduced a 5TB model.
|Seagate ST5000LM000||2.5”||10TB||Street price (two 5TB at $210)||$420|
|Seagate ST2000LM015||2.5”||2TB||Street price||$98|
|HGST HUH721010ALE600||3.5”||10TB||Street price||$495|
|HGST HUS7260xxALN61y||3.5”||2TB||Street price||$127|